7 letters · 12 points in Scrabble
noun a soft silvery-white tetravalent radioactive metallic element; isotope 232 is used as a power source in nuclear reactors; occurs in thorite and in monazite sands
originEtymology tree English Thor Proto-Indo-European *-om Proto-Italic *-om Latin -umder. English -ium English thorium From Thor + -ium.
Etymology from Wiktionary, CC BY-SA 3.0